Kinematograph.



, PATENTED MAR. L3} 1906 .W. H. BAKER. KINEMATOGRAPH. APPLIGATION FILED FEB. 6, 19 04.

3 SHEETSSHEET 1.

WITNESSES v/' ATTORNEY No. 814,662. PA'TENTED mmls, 1906 W.-H. BAKER. KINEMATOGRAPH.

APPLICATION FILED FEB, 6. 1904 3 JSHEETSSHBET 2 A ATTORNE No. 814,662. PATENTED MAR. 13, 1906. W; H. BAKER.

KINEMATOGRAPH.

APPLICATION FILED FEB. 6. 1904.

s SHEETS-SHEET a.

WITNESSES! iNVENTOR P/m 'ATTORNEY WILLIAM H. BAKER, or CENTRAL FALLS, nnonn ISLAND.

, VKINEMATQGIRAPH.

, Specification of Letters'Patent. Application filed February (X1904. Serial No. 192,811.

Patented March 13, 1906.

To all whom it may concern: Be it known that 1, WILLIAM H. BAKER, a citizen of the United States, and a resident of 'Central Falls, Providence county, state of Rhode Island, have invented certain new and useful, Improvements in Kinematographs, of which the following is a specification. I

My invention relates to kinematographs or similar apparatus for exhibiting pictures in which the impression is given to the eye of objects in motion.

In carrying my invention into effect the pictures are arranged in a spiral or helical path upon a glass or other suitable disk and the disk rotated intermittently in front of a lantern lens and at the same time moved latorally in such manner that as the helical line of pictures passes the lens the disk will be moved laterally an amount corresponding to the breadth of the helical line for each coinplcte revolution of the disk. Consequently the pictures in succession will bepresented for projection upon a suitable screen until the whole series IS seen, after Winch the mechanism may'be returned to the ori inal position for a repetition of the describe movements.

In the following specification I have described my invention as employed in connection with a lantern to project the pictures upon a screen; but it is to be understood that thc'invcntion is equally applicable to apparatus for viewing directly by the eye a series of hotographic or other pictures.

I tis also to be understood that the invention may be employed to intermittently rotate and advance a sensitized plate or disk in front of a photogra liic lens in order that the series of photographs may be produced in a spiral path on said disk.

My invention further contemplates a duplex apparatus employing two disks and two anterns, the relation between the two being such that each projects a series of pictures onto a common screen, a constant and uninterrupted amount of light being maintained on'the screen on which the pictures are 'projected.

The invention will be understood by reference to the accompanying drawings, in which Figure 1. is a front elevation, and Fig. 2 a

side elevation, of one embodiment of my invcntion. Fig. 3 is a top view of the driving mechanism. Fig. 4 is a rear view of the driving-disk. Fig. 5 is a detail sectional view of the driving wheel and disk, and Fig. 6 is a detail of the stop motion.

Similar numerals indicate similar parts in the several views.

As above stated, my Invention contemplates the adoption of two combined apparatus, one being a counterpart of the other. 1 shall therefore first describe one set of mechanisms and afterward describe how the two are combined and adapted to coact with each other.

Referring to the drawings, the numeral 1 designates a lantern or rojecting instrument of any suitable or we] -known type, and 2 a picture-disk adapted to be rotated and advanced in front of the lens thereof. The pictures upon this disk consist of photographically-produced positives, each picture being about one-quarter of an inch in diameter with a black or opaque ground-that is, allthe space on the plate except that occupied by the pictures themselves will be black or o aque.

The pictures, which are upon any suitable transparent mounting, as glass, or, of celluloid, it is clamped between suitable plates, are arranged in a spiral or helical path, as indicated by the broken line 37 in Fig. 1, a few of the pictures being indicated by circles. By assembling the pictures in this manner a very large number may be contained in a small compass, overcoming many objections incident to the generally used continuous films, and particularly in that a greater number of pictures may be exposed per unit of time than is practically ossible with a film, thus giving a better-dc ned and more lifelike impression upon the eye. The desired movements of the picture-disk are obtained through the following instrumentalities: 3 designates a shaft mounted in bearings in the side frames 4 4. Said shaft carries the drivin -gear 5 and may be rotated by any suitab e form of motor or manually by means of the handle 6. The driving-gear 5 meshes with an intermediate gear 7, and the latter in turn meshes with a pinion 8, which is mounted on a shaft 9, having hearings in the side frames 4 4, and which shaft carries a single-. toothed inion 10, constituting one member of a wellnown form of stop-motion. )lounted on a shaft 1], which is parallel with the shaft 9, is the second member 12 of the stopmotion. The member 12 is in the form of a wheel provided with radial recesses 38 in the periphery thereof, Fig. 6, adapted to be engaged by the tooth 39 of the pinion 1t) to impart to said wheel an intermittent rota r v motion. The shaft 11 extends across the center of a disk 13 and carries at its other end a toothed wheel 14, having as many teeth thereon as there are notches or recesses in the wheel 12 of the stop-motion. The disk 13, which preferably of metal, is perforated or recessed, as shown at 40 in Figs. 1 and 5, the perforations or recesses being arranged in a spiral path and corresponding in position and number to the pictures on the disk 2. The toothed wheel 14 is on the optical axis of the lantern or projecting instrument 1, and said disk 13 is intermittently rotated by said toothed wheel engaging successive perfora-' tions or recesses 40 when said wheel is intermittently rotated through the train of gearing above described. The motion of the disk 13 is transmitted to the picture-disk 2 through a shaft 15, on which both disks are mounted. Said shaft 15 is mounted in bearings 16 16, which form part of a swinging frame comprising side arms 18 18, connected by a web 19. Said side arms are pivotally mounted at 17 1.7 on a shaft 22, set in hearings in upright frames 21 21. The shaft 22, on which the swinging frame is mounted, carries a collar 23 and spring 24, which tends to hold the disk 13 up against its driving-wheel 1 1.

Not only must a rotary motion be imparted to the picture-disk 2, but said disk must be advanced laterally. This latter movement is effected by the following means: Pivotally mounted midway of the length of the side arms 18 18 of the swinging frame are camrollers 20, and'in the upright frames 21 21 is supported a shaft 25, which carries two constant-progression cams 26 26, one at each end, which cams bear against the-rollers2t). The shaft 25 carries a collar 43 and spring 27, the latter fixed at one end to the bearing and the other to said collar, to return the cams 26 26 to their initial position, hereinafter described.

Meshing with the driving-gear 5 is a gear 28, Fig. 2 mounted on a shaft 29, carried by a fixed frame 30. A worm 31 is carried by the shaft 29, so as to be rotated thereby, and said worm meshes with a worm-wheel 32, mounted on avertical shaft 33, the upper end of said shaft having a bearing in an arm 41 of the fixed frame 30, and the lower end being stepped in a fixed frame 31. At the upper one of the vertical shaft 33 is a worm 35, which meshes with a worm-wheel 36, (see Fig. 1,) mounted on the can't-shaft 2i Through this last-described train of earing the cams 26 26 will be rotated when the machine is operated.

The operation of the mechanism so far described is as follows: Power being applied to the shaft 3, the rotary motion thereof is com- 1 municated, through the gears 5, 7, and 8, to

the single-totalled pinion 1t), and by the latter an intermittent rotary motion is imparted to the rack disk 13 and a corresponding movement to the picture-disk 2. As the per forations or recesses in the disk 13 correspond in arrangement, position, and number to the pictures on the disk 2, it is obvious that each engagement of a tooth on the wheel 14 with a perforation or recess in the disk 13 will impart an intermittent rotary movement to said disk and will bring a picture on the disk 2 into and allow the same to remain in the illuminated field for an inter al of time, the interval of exposure necessarily being greater than the time required to effect the change from one picture to another, owing to the employment of the described stop-motion 1t) 12. Simultaneous with the intermittent rotary motion the swinging frame is moved, and in consequence the picture-disk is advanced laterally across the optical axis of the lens in the lantern 1 through the actions of the cams 26 26 on the rollers 20. This lateral movement is uninterrupted and at a uniformlyvarying speed, either accelerated, if the exposure begins at the outer convolution, or retarded, if the exposure begins with the inner convolution. 1n the positionshown in the drawings the exposure is begun with the pictures on the outer convolution of the spiral, (although the pictures could be arranged beginning at the center,) so that for every unit of angular advance of the cams 26 the disk 2 is advanced a unit of lateral movement. The contiguous convolutions of the spiral are placed near as possible to each other to save space, and the cams 26 are so constructed that for each complete rotation of the disk 2 said disk will be advanced laterally a distance equal to the diameter of one picture or the distance between contiguous convolutions of the spiral. For ex ample, if the pictures are one-quarter of an inch in diameter the cams 26 will advance the disk 2 thatdistance for each convolution of the spiral or for each complete rotation of the said disk. Also when beginning at the outer end of the spiral every unit of advance along the spiral-thatfis, from the center of one picture to the center of the next succeeding pictureinvolves a varying angular speed of the disk 2, due to the approach of the spiral toward its center. In the present case the angular speed is uniformly accelerated, owing to the use of the described stop-motion, but the time of exposure'remains constant.

T1318 well known that the present class of I apparatus takes'advantage of the fact that the eye is unable to perceive a movement exceeding a certain velocity and of the persistence of vision. As the time of exposure is comparatively greatly in excess of the time required to change from one picture to the next succeeding and the varying angular speed and the amount. of lateral movement for each picture so infinitesimal that the change is imperceptible, the image'is readily retained.

When a series of pictures has been exhibited and the 'end o'l the spiral reached, the disk 2 will have been'advanced until the last picture is inline with the optical axis of the lantern-lens and the swinging frame will have reached the limit of its movement. The

to be swung on its pivotal supports to restore the picture-disk 2 and its rack-disk 13 to the starting position.

Any suitable means may be employed to secure the picture-disk on the shaft 15 and to permit the ready removal of one disk and its replacement by another.

Inasmuch as the present apparatus'is designed for use with a photographic picturedisk having the ground black or opaque and as the period of change from one picture to the next on the disk is so infinitesimal as not to be perceived by the eye, there will be no necessity for the use of a shutter. If, however, this is found necessary, any of the .wellknown forms of shutters could be used.

1 have so far described my invention applied to a single projecting instrument; but, as shown in the drawings, 1 contemplate employing the described mechanism in duplex form, as many advantages are secured there by. So far as known to me a kinematograph of the film type -apable of from ten to twelve exposures per second only; but by grouping the pictures on two disks and exposing them alternatelythat is, beginn ng with the first picture on the first disk, then the first on the second disk, which is a step in advance of the first picture on the first disk, then the second on the first disk, then the second on the second disk, and so on-not only may a large number of pictures be grouped into a small compass, but the number of pictures exposed per second may be in creased to about sixteen, and by shifting from one disk to the other each disk will have to be moved but eight times per second to obtain the samc effect if one disk were moved sixteen times per second. This will result also in giving a clearer projection on the screen In carrying out this part of my invention I construct a mechanism similar in all its parts to that previously described, the corresponding parts being indicated by corresponding numerals primed, and mount the whole in a suitable frame so that the illumi-- nated field of lantern 1 will be superimposed upon that of lantern 1. As shown in the drawings, the constant-progression cams 26 26 derive their motion through the shaft 33 common to both sets of mechanisms. The intern'iittent rotary movement of the disk 2 corresponds in character and extent to that of the disk 13 just as disk 2 corresponds to that of disk 13 in this respect and also in having its axis advanced toward the optical axis by the constantrogres'sion cams. In. order, however, to properly time the exposures on the two picture-disks the one-toothed pinions 10 and 10 are set one half-rotation apart-that is, while the wheel 14 is being moved by the pinion 10 to rotate picturedisk 2 the wheel 14 will be locked by the pin ion 10, so that a picture on disk 2 will be exposed. The relation of the tooth 39 on the pinion 10 to the tooth 39 on pinion 10 is indicated in Fig. 6. It is obvious from this relation of the pinions 10 and 11) that if we begin with the first picture on disk 2 it will be immediately succeeded by the first picture on disk 2, that by the second picture on disk 2, the latter by the second picture on disk '2, and so on, it being understood that the successive pictures exposed are successive views of the object photographed. In other respects the mode of operation of the complemental mechanism is precisely like that first described.

If the picture should be arranged on the disk beginning at the center of the spiral, it is obvious that the angular speed of rotation would be'uniformly decreased in l raveling to the outermost convolution and that the axis of said disk would be moved away from the optical axis at. a uniforinly-retarrled rate of speed. Such changes in thedescribcd mech anism to meet this condition are obvious.

While I have described my invention in connection with an apparatus for projecting a picture upon a screen, it is to be understood that the mechanism may be mounted in a suitable casing so that the pictures fixed upon the disk 2 may be viewed directly by the eye, as in well-known types of mechanism of this class. Neither do l. wish to confine myself to the precise details of construction shown and described, as they may be varied Without departing from the principle of the invention.

The disk 13, as described, having perforations or notches, is, in effect, a rack-disk, and it is obvious that a continuous rack having teeth to cooperate with a proper gear-wl'ieel or pinion is within the purview of the invention.

In order to return the frame to its initial position, as above referred to, the upwardlybent arm 44 of the lever 42 bears against the fixed collar 23 to release the disk 13 from ento an arm 44, which bears against a collar ters Patent, is-

intermittently rotate said disk at a uniformlyl'or intermittently rotating said disk at a unigag'ement with the toothed wheel 14. In the duplex form of the invention a link 45 connects the lever 42 with a rod 46, and the latter through a pivoted link 4-5 is connected 23, fixed on the shaft 22. The movement of the lever 42 serves, therefore, to release both disks 13 and 13 simultaneously from engagement with their respective drivingwheels.

hat I claim, and desire to secure by Let 1. In a kinematograph or similar apparatus the combination of a disk having pictures arranged thereon in a spiral path, means to varying rate of speed, and means to continuously advance the axis of said disk toward or away from the optical axis.

2. In a kinematograph or similar apparatus the combination ofa disk having pictures arranged thereon in a spiral path, means to intermittently rotate said disk, and means to continuously advance the axis of said disk toward or away from the optical axis at a uniformly-varying rate of speed.

3. In a kinematograph or similar apparatus the combination of a disk having pictures arranged thereon in a spiral path, means to intermittently rotate said disk at a uniformlyvarving rate of speed, and means to continuously advance the axis of said disk toward or away from the optical axis at a uniformly-varying rate of speed.

4. In a kinematograph or similar apparatus the combination of a disk having pictures arranged thereon in a spiral path, means to intermittently rotate said disk at a uniformly varying rate of speed, and independently-op erated means to continuously advance the axis of said disk laterally toward or away from the optical axis.

5. In a kinematograph or similar apparatus the combination of a disk having pictures arranged thereon in a spiral path, of means formly-varying angular speed While maintaining a constant period of exposure, and means forcontinuonsly advancing the axis of said disk toward or away from the optical axis at a uniformly-varying rate of speed.

6. In a kinematograph or similar apparatus the combination of a disk having pictures arranged thereon in a spiral path, means to intermittently rotate said disk at auniformly varying rate of speed, a cam adapted to ad vance the axis of said disk toward or away from the optical axis at a continuous uniformly-varying rate of speed, and means to continuously rotate said earn.

7. In a kinematograph or similar apparatus the combination of a disk having plctures arranged thereon in a spiral path, a rack-disk mounted on the same shaft as said picturedisk, the teeth on said rack-disk being ar- 1 ranged in a spiral path similar to, and corresponding in pos tion and number to the pictures on the picture-disk, a toothed wheel engaging said rack-disk and means for intermittently rotating said toothed wheel.

8. In a kinematograph or similar apparatus the combination of a disk having pictures arranged thereon in a spiral path, a wheel adapted to intermittently rotate said disk at a uniformly-varying rate of speed, a cam adapted to continuously advance said disk toward or away from the optical axis, a power-shaft, and independent means connecting said shaft to said wheel and cam respectively to produce the stated movements of the picture-disk.

9. In a kinematograph or similar apparatus the combination with a pivotally-supported frame, of a disk carried by said frame said disk having pictures arranged thereon in a spiral path, means to intermittently rotate said disk, and means to simultaneously move said frame on its pivotal support to carry said disk across the optical axis.

10. In a kinematograph or similar apparatus the combination with a pivotally-supported frame, of a disk carried by said frame said disk having pictures arranged thereon in a spiral ath, means to intermittently rotate said disk a cam bearing against said frame and adapted to move it on its pivotal support at a continuous but uniformly-varying rate of s eed, and means to continuously rotate said cam.

11. In a kinematograph or similar apparatus the combination with a pivotally-suported frame, of a shaft supported by said rame, a disk having pictures arranged thereon in a spiral path and supported on said shaft, a rack-disk also supported on said shaft, means to continuously move said frame on its pivotal support so as to carry the picture-disk across the optical axis at a uniformly-varying rate of s eed, and means to intermittently rotate sai rack-disk while said frame is being moved.

12. In a kinematograph or similar apparatus the combination With a pivotally-suppxorted frame, of a shaft supported by said 'ame, adisk havin pictures arranged thereon in a spiral at and supported on said shaft, amok-disk also supported on said shaft, means to continuously move said frame on its pivotal support so as to carry the picturedisk across the optical axis at a uniformlyvarying rate of speed, means to intermittently rotate said rack-disk while said frame is being moved, and means to release said rack-disk from its driving means to permit the parts to be restored to their initial positions.

13. In a kinematograph or similar apparatus the combination of a disk having pictures arranged thereon in a spiral path, a rack-disk having teeth thereonarranged in a similar spiral path, are mounted, a

axis thereof, a

- to intermittently rotate said wheel.

. meshing 14. In a kinematograph orsimilar appara tus the combination with a frame, of a shaft supported therein, arms engaging said shaft,- a picture-disk carried by said shaft, cams adapted to bear a power-shaft and means actuated thereby to impart a continuous rotary movement pivotal supports for said arms,

against said arms,

to said cams to thereby said frame to advance the ward or away from the optical axis.

15. In a kinematograph or similar apparatus the combination with a pivotally-supported frame, of a shaft carried by said frame,

the pictures arpath, a second having a rack thereon also arranged in a spiral path, a toothed wheel ena power-shaft, a train of gears connected to said shaft adapted to in toothed wheel, said train comprisinga single-tooth driving-wheel tc ed driven wheel, said shaft of a disk on said shaft havin ranged thereon in a spira disk on said shaft gaging saidrack,

termittently rotate said with a'no driven wheel being mounted on the said rack-engaging wheel.

16. In a kinematograph or similar apparaboth having pictures arranged thereon in a spiral path, the twosets of pictures constituting a single grou with successivepicturesalternating on f for exhibiting a picture first then on the other so as to successivel .-present to view the pictures of a to intermittently rotate said disks at 'a uniformly-varying rate of speed, and means to continuously advance t tus the combination of two disks the r isks, means on one disk and means e axes of said disk toward or away from the optical axes.

17. In a kinematographor similar apparatus the combination of two disks both having pictures arran ed'th'ereon in a spiral path,

the two sets 0 pictures constituting a singlev group with successive pictures alternating on for intermittently rotating I said disks alternately, said means comprising independent trains of gears connected to the the disks, means a shaft on which both said disks shaft extending parallel with the plane of said rack-disk and across thetoothed wheel mounted on said last-named shaft in line with the optical axis and engaging said rack-disk, and means rock picture-disk to- Ina kinematograph or similar appara grou the successive pictures alternatingon the isks', means for intermittently rotat ng rate of. s eed, and means to continuously advance tlie axes of said disks toward or away from the optical axis at a uniformly-varying rate of speed. i

. 19. In a kinematograpli or similar appara tus the combination of two disks having pic- ,tures arran ed thereon in a spiral path, the two sets 0 pictures constituting a single group with successive pictures alternating on frames on which said disks are mounted, a power-shaft, independently-operated means connected to said shaft for intermittently rotating said disks alternately at a uniformlyvarying rate of speed, independent sets of cams bearing against said frames and adapted to advance said disks toward or away from the optical axis at a uniformly-varying rate of speed, and means actuated by said power-shaft to continuously rotate said cams.

20. A kinematograph or similar apparatus comprising two'projecting lanterns, means to support picture-disks in proper relation to sald lanterns, said disks having pictures arranged thereon in a spiral path theitwo sets of pictures constituting a single group with successive pictures alternating on the disks, independent cams adapted to advance said disks continuously at a uniformly-varying rate of speed toward or away from the optical axis, worm-gearing and means actuating the same to impart a'continuous simultaneous rotary mo'vement to said cams, and means to intermittently rotate said disks alternately at a uniform varying rate of speed.

In testimony whereof I have hereunto signed my name in the presence of two sub- JOHN A. MmnLnroix.

disks both having the two sets 0 pictures constitutmg a single.

said disks alternately at a uniformly-varying the disks, independent pivotally-supported 

